Naval Brass, Uninhibited UNS-C46400

Naval Brass is a 60:40 copper zinc alloy to which about 1% of tin has been added to improve the corrosion resistance, particularly to dezincification. The alloy is a two phase alpha-beta brass, hence has reasonably high strength with lower ductility than the single phase 70:30 or alpha brass. It is used for structural applications and for forgings, especially where contact with sea water is likely to induce corrosion. The mechanical properties are almost indistinguishable from those of 60:40 brass C28000, although the tin addition tends to give slightly higher strength.

(% maximum, unless shown as range or minimum)

	Copper	Iron	Lead	Tin	Zinc
Min/Max	59.0-62.0	0.10	0.20	0.50-1.00	Remainder
Nominal	60.0	–	–	0.7	39.2

Copper + Sum of Named Elements, 99.6% minimum

Product	Specifications
	AMS	ASME	ASTM	Federal	Military	SAE
Bar	4611, 4612		B21	QQ-B-639		J461, J463
Bar, Forging			B124
Bolts			F468
Forgings, Die			B283
Nuts			F467
Plate				QQ-B-639
Plate, Clad			B432
Plate, Condenser Tube		SB171	B171
Rod	4611, 4612		B21			J461, 463
Rod, Forging			B124
Screws			F468
Shapes			B21
Shapes, Forging			B124
Sheet				QQ-B-639
Strip				QQ-B-639		J461, J463
Studs			F468
Wire, Metallizing					MIL-W-6712

Room Temperature, 20°C

Temper	Section Size	Cold Work	Temperature	Tensile Strength	Yield Strength(0.5% ext under load)	Elongation	Rockwell Hardness				Vickers Hardness	Shear Strength
	mm	%	°C	MPa	MPa	%	B	C	F	30T	0.5	MPa
Flat Products
H01	1	0	20	483	400	17	75	–	–	68	138	296
M20	25.4	0	20	379	172	50	55	–	–	55	99	276
O50	1	0	20	427	207	40	60	–	–	57	107	283
O50	6.35	0	20	414	193	45	58	–	–	56	104	283
O60	6.35	0	20	400	172	49	56	–	–	55	100	276
Rod
H01	6.35	10	20	483	331	25	80	–	–	–	150	296
H01	25.4	8	20	476	317	27	78	–	–	–	146	296
H01	51	8	20	462	276	35	75	–	–	–	138	296
H02	6.35	20	20	552	393	20	85	–	–	–	164	310
H02	25.4	20	20	517	365	20	82	–	–	–	156	303
O50	6.35	0	20	434	207	40	60	–	–	–	107	290
O50	25.4	0	20	434	207	40	60	–	–	–	107	290
O50	51	0	20	427	193	43	60	–	–	–	170	290
O60	6.35	0	20	400	186	45	56	–	–	–	100	276
O60	25.4	0	20	393	172	47	55	–	–	–	99	276
O60	51	0	20	386	172	47	55	–	–	–	99	276
Tube
H80	0.0	35	20	607	455	18	95	–	–	–	200	–